Merge pull request #389 from mollie/add-fix-codestyle

Add command to fix codestyle

Author: geertjanvdenbosch

DEVELOPMENT.md

@@ -21,4 +21,10 @@ To run tests for all Python versions:
 tox
 ```
 
+## Fixing codestyle issues
+
+If the tests fail on the flake8 step, run:
+
+    make fix-codestyle
+
 TODO: Deduplicate Python version list in [tests.yaml](.github/workflows/tests.yaml)

Makefile

@@ -0,0 +1,9 @@
+.venv:
+	uv venv --python 3.12
+	uv pip install black
+
+fix-codestyle: .venv
+	.venv/bin/black mollie
+
+clean:
+	rm -rf .venv